Sidney s



SIDNEY s. HURLBUT, or CORDOVA, tnniuois;

Leners Patent No. 77,490, me May 186s.

IMPROVEMENT tu GRAIN-semences' dige Situatie nicht tr im illust ttttts glntuit mit uniting niet at 11py suur.

TO ALL WHOM' IT MAY CONCERN:

Be it known that I, SIDNEY HURLBUT, of Cordova, in the county of Rock Island, andState of Illinois, hnveinvcnted a newiand improved Grain-Separator; and I do hereby declare that the following is full, clear,

.and exact description` thereof, reference being had to the accompanying drawings, making u part of this speeification, in whiehhl'iigure 1 is un elevation oi onc side of 'the machine. l y ,9

Figure 2 is a top view.. Figure 3 is a section, taken longitudinally through the machine, in the verticni plane indicated by red line :c in iig. 2. A i

Figure 4 is a sectional view, in detnil, ot' the grain-screens. Similar letters of reference indicate' corresponding parts in the several ignres. v This invention relates to a new and useful improvement on funningmills or separators, whereby oats and other grains and foreign substances are separated from wheat by a repeatedor successive passage of the unclean wheat .thpeugh the screens, while that portion of the wheat which is cleaned or separated from its impurities is conducted out of the machine. i I v The nature-Of my inyention consists in a grain-separating shoe or huddl'e" of a peculiar-construction, which is suspended in front oi' a. fan, so as to receive a shaking movement, and, at the same time, strong-blasts of air, in combination with an elevator, which is -so arranged that all that portion of the wheat which is not cleaned or separated of its impurities after passing through the said hu'd'dle will be elevatedand discharged into the hopper, to be again subjected to the cleaning-process, which operations will be repeated long as the machine is in motion, as will be hereinafter described. I f

lo enableothers skilled in the art to understand my invention, I will describe its construction and operation'. In the accompanying drawings, A represents the frame of the machine, which is` provided with n. 'rotary fan, B, und a, fan-case, G, at one end, and left opennt its opposite end, for the escape of oats and other foreign substances blown oil" by the fan-blast. On top of this frame A is o. hopper, D, and on one side of' this frameA, outside, is an elevator-case, E. This elevator-cese has a. spout, El, emptying into the hopper D; and it contains au endless band of buckets, a a, which receive wheat, mixed with foreign substances, in a chamber, E2, at its base, anddischar'ge it into said hopper.

The shaft Z) of the upper drum, over which the band of buckets a passes, carries a small pulle'y,`c, which is driven from a large pulley, o', on a short shaft, c, which pulley e' receives motion -from the fan-shaft, throughthe medium 'of two spur-wheels, gg, thereby causing the buckets in the elevator-case to move around by the motion imparted to the upper drumvfrom the fan-shaft. The opposite end of the fan-shaft has acranl: formed on it, which communicates motion to a rightfangular' lever, d, through the medium of a connecting-rod, d, us shown 'in figa 2. whichdever is connected to and'imparts a rapid shaking,l motion to the graiirserecns. i v I Within the frame A, und suspended from it by means of straps t ,7L 7L', is :tscreen-shoe, G, having a number of sicves or screens arrangedy within it, as will be hereinafter described; and below thisscreen-shoe is u receivingboard, 1l, which inelines,`as shown. in iig. `A5, and receives upon it the partially-cleaned wheat falling from the screens, and delivers this impure wheat into d trough,- I, which ineliues toward and deiivers the wheat and its foreign matters into lthe chamber E2 of the elevator-ease, to be carried up and again discharged into the' hopper D. Another screen, J, is arranged beneath soule of, the jsereoning-surl'aees oi' sir-id shoe Gr, and partly over the inclined board H and trough .l for, the iur ose of recoit/infJr all the cleaned wheat, and discharc'inf,T it into an s. 7 h p l D a u l y inclined trunk, K, which carries it out of the machine beneath the fameuse, as shown in ig.3. 4

I will now describe tlieconstructiou and arrangement of the screens or sieves which eiiect the separation of the wheat from oats and other substances found inixed with it.

My object in arranging thc screens in the shoe Gr, ass-hewn in the drawings, 3 and d, is to. llow thel wheat which will readily pass 'oit clean to cse-ape irst, and es quickly as possible, and then to conduct the wheat mixed more or less with impurities o v'eriandthrough screening-surfaces subjected tostrong'and also rapid rotary motions, gathering these substances finally upon the inclined board H, to be conducted back to the hopper D, andpassed through the several screens again. Another object of aranging the several screens as shown is to regulate the amount of screening-surface, according Aas there may be more or less impurities mixed will the wheat. i

,The first or highest screen L receives the wheat mixed with foreigngrains and other substances from an inclined board, L', which is arrangedbeneath the feed-opening ofthe hopper D, which opening can be increasedor diminished in size by the slide D. Beneath this screen L is a short screen, p, and a. long screen, p', which srearrangcd in the same inclined plane. The4 long screen is made movable, so that it can be drawn-entirely out when tho wheat is not very much mixed wijn foreign matters. Beneath these screens p p are two inclined screens, r r', the shortest and highest one of which slightly overlaps the long onc, so Las not to allow the grains to be arrested at this point,.but.to cause it to pass oli' upon the scrccnr as quick as possible.

Beneath the screen r' are two short screens, s t, which will screen that portion of the grain that does not pass through the previously-mentioned overhanging serconsp and r.. Thel highest .portion'ofJ the uppermost screen L and the two short screen'sp and r overhang or extend back of the two screens s t, and all the clean 4Wheat which escapes through these orerhanging screens falls upon the screen J, and is immediately conducted olf, as before described.

Beneath the lowermost short screen t is a narrow board, V, which is 'secured to the shoe by means of Yscrews passing throughoblong slots made throughthis board, for the purpose of adjusting the latter 'toward or from the upper end of the screen-t., This hoard is designed to serve as a cut-off, for prevent-ing impure wheat from falling upon the screen J, and being carried oli` with the pure wheat. Another cut-cliff, is applied over the short screen, 1*, so' that it`can be moved back und forth, for the purpose of covering up more or less of this short sc-rceu, as may be required.

`It. will be seen, fromthe above description, that the screens are so arranged that all the clean wheat which -is allowed to escape through the heads or upper ends of the screens will be carried directly out oi`the machine,

and will not pass over the other screen-surfaces with the impurities. n

The cut-ofi' 'l is designed' for regulating the size of the short screen p, according as there maybe more or less impurities mixed with the whert, and the out-oif or gauge V is intended for separating the clean from the unclean grain in the i'all of the Asame from the screen t, und for directing the unclean grain uponthe inclined hoardH to4 be carried up to the hopper again for rre-screening.

"Having described my invention, what I claim as' new, and'desire to secure by Letters Patent, is-

1. The combination of the` screening-shoe, constructed and operating substantially as described, with un elevator, which leads back into the hopper, and 'with a Ycleaned-grain discharge-passage, substantially as described end for the purpose set forth., i t l 2.11 claim the employment of'v an elevator, which will return that portion of the wheat which 'escapes from the screens in an unclean stateback to the hopper to'be rescreened,` substantially as specified.

3. The combination of Vthe screens L, p, and r', the short screens s t, the out-oil` T, and the gauge V, with 'means for conveying the clean wheat out ofthe machine, and also -for conducting back to the first screen L the wheahwhich' is mixed with foreign substances, substantially as described. n

' SIDNEY S. HURLBUT.

. Witnesses:

J. CooL, Jr., W. C. ZIMMERMAN'. 

